IDirect3D9::CheckDeviceFormatConversion method (d3d9helper.h)

Tests the device to see if it supports conversion from one display format to another.

Syntax

HRESULT CheckDeviceFormatConversion(
  [in] UINT       Adapter,
  [in] D3DDEVTYPE DeviceType,
  [in] D3DFORMAT  SourceFormat,
  [in] D3DFORMAT  TargetFormat
);

Parameters

[in] Adapter

Type: UINT

Display adapter ordinal number. D3DADAPTER_DEFAULT is always the primary display adapter. This method returns D3DERR_INVALIDCALL when this value equals or exceeds the number of display adapters in the system.

[in] DeviceType

Type: D3DDEVTYPE

Device type. Member of the D3DDEVTYPE enumerated type.

[in] SourceFormat

Type: D3DFORMAT

Source adapter format. Member of the D3DFORMAT enumerated type.

[in] TargetFormat

Type: D3DFORMAT

Target adapter format. Member of the D3DFORMAT enumerated type.

Return value

Type: HRESULT

If the method succeeds, the return value is D3D_OK. If the method fails, the return value is D3DERR_INVALIDCALL. The method will return D3DERR_NOTAVAILABLE when the hardware does not support conversion between the two formats.

Remarks

Using CheckDeviceType to test for compatibility between a back buffer that differs from the display format will return appropriate values. This means that the call will reflect device capabilities. If the device cannot render to the requested back buffer format, the call will still return D3DERR_NOTAVAILABLE. If the device can render to the format, but cannot perform the color-converting presentation, the return value will also be D3DERR_NOTAVAILABLE. Applications can discover hardware support for the presentation itself by calling CheckDeviceFormatConversion. No software emulation for the color-converting presentation itself will be offered.

CheckDeviceFormatConversion can also be used to determine which combinations of source surface formats and destination surface formats are permissible in calls to StretchRect.

Color conversion is restricted to the following source and target formats.

• The source format must be a FOURCC format or a valid back buffer format. For a list of these, see FourCC Formats and BackBuffer or Display Formats.
• The target format must be one of these unsigned formats:

  D3DFMT_X1R5G5B5	D3DFMT_A1R5G5B5	D3DFMT_R5G6B5
  D3DFMT_R8G8B8	D3DFMT_X8R8G8B8	D3DFMT_A8R8G8B8
  D3DFMT_A2R10G10B10	D3DFMT_A16B16G16R16	D3DFMT_A2B10G10R10
  D3DFMT_A8B8G8R8	D3DFMT_X8B8G8R8	D3DFMT_A16B16G16R16F
  D3DFMT_A32B32G32R32F

   

Requirements

See also

ColorFill

IDirect3D9